PHP · Theory

mt_rand()

Theory

314/352

mt_rand()

Isha only reaches for mt_rand() when a mt_rand dry-run has to stay correct in a viva board.

mt_rand() on the board — one mt_rand step Isha can write from memory. Then say what a mt_rand dry-run looks like after.

Skip mt_rand() and only reciting the name of mt_rand shows up in a viva board.

Use mt_rand() when a mt_rand dry-run must stay clear. If a simpler PHP step works, use that instead.

If a mt_rand dry-run breaks under mt_rand(), check only reciting the name of mt_rand first.

Place mt_rand() next to nearby PHP work — one mt_rand step Isha can write from memory is the link.

Viva for mt_rand(): what it is → one mt_rand step Isha can write from memory → the mistake (only reciting the name of mt_rand).

Exam tip

For mt_rand(): definition + a viva board + one failure.

Example

<?php
// mt_rand()
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

mt_rand(): scores array, print avg, then high marks. Say the output.

Short notes

Defmt_rand() — Isha uses it for a mt_rand dry-run in a viva board.
Rulemt_rand() → one mt_rand step Isha can write from memory.
Remembermt_rand() + the PHP runtime (a viva board).
Usemt_rand() in a viva board (a mt_rand dry-run).
Trapmt_rand() — only reciting the name of mt_rand.
Exmt_rand() → a mt_rand dry-run.

PHP · Theory

mt_rand()

← All stacks

Theory

314/352

mt_rand()

Isha only reaches for mt_rand() when a mt_rand dry-run has to stay correct in a viva board.

mt_rand() on the board — one mt_rand step Isha can write from memory. Then say what a mt_rand dry-run looks like after.

Skip mt_rand() and only reciting the name of mt_rand shows up in a viva board.

Use mt_rand() when a mt_rand dry-run must stay clear. If a simpler PHP step works, use that instead.

If a mt_rand dry-run breaks under mt_rand(), check only reciting the name of mt_rand first.

Place mt_rand() next to nearby PHP work — one mt_rand step Isha can write from memory is the link.

Viva for mt_rand(): what it is → one mt_rand step Isha can write from memory → the mistake (only reciting the name of mt_rand).

Exam tip

For mt_rand(): definition + a viva board + one failure.

Example

<?php
// mt_rand()
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

mt_rand(): scores array, print avg, then high marks. Say the output.

Short notes

Defmt_rand() — Isha uses it for a mt_rand dry-run in a viva board.
Rulemt_rand() → one mt_rand step Isha can write from memory.
Remembermt_rand() + the PHP runtime (a viva board).
Usemt_rand() in a viva board (a mt_rand dry-run).
Trapmt_rand() — only reciting the name of mt_rand.
Exmt_rand() → a mt_rand dry-run.

mt_rand()

Example

Short notes

Questions

mt_rand()

Example

Short notes

Questions